<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table {
            width: 500px;
            margin: 100px auto;
            border-collapse: collapse;
            text-align: center;
        }
        
        td,
        th {
            border: 1px solid #333;
        }
        
        thead tr {
            height: 40px;
            background-color: #ccc;
        }
    </style>
</head>

<body>
    <table cellspacing="0">
        <thead>
            <tr>
                <th>姓名</th>
                <th>科目</th>
                <th>成绩</th>
                <th>操作</th>
            </tr>
        </thead>
        <tbody>

        </tbody>
    </table>
    <script>
        //1先去准备好学生的数据 
        var dates = [{
                    name: '张三',
                    subject: 'js',
                    score: 100,
                }, {
                    name: '李四',
                    subject: 'js',
                    score: 90,
                }, {
                    name: '王五',
                    subject: 'js',
                    score: 80,
                }

            ]
            // 2 往tbody里面创建行, 有几个人就创建几行
        var tbody = document.querySelector('tbody')
        for (var i = 0; i < dates.length; i++) {
            var tr = document.createElement('tr');
            tbody.appendChild(tr);
            // 行里创建单元格td,单元格的数量取决于每个对象里面的属性的个数
            for (var k in dates[i]) {
                var td = document.createElement('td')
                td.innerHTML = dates[i][k];
                tr.appendChild(td)
            }
            // 创建有删除操作的单元格
            var td = document.createElement('td');
            td.innerHTML = '<a href="javascript:;">删除</a>'
            tr.appendChild(td)
        }
        // 删除操作
        var as = document.querySelectorAll('a')
        for (var i = 0; i < as.length; i++) {
            as[i].onclick = function() {
                // node.removeChild(child)
                tbody.removeChild(this.parentNode.parentNode)
            }
        }
    </script>

</body>

</html>